Laravel change db at runtime - php

Question

i have an application with one level database for login the users and N databases for one or more users.
i want change the db after a user login.
the db params are stored in the table of the user, so after login i have this:
Config::set("database.connections.mysql", [
"host" => "localhost",
"driver" => "mysql",
'default' => 'mysql',
"database" => $dati->db,
"username" => "root",
"password" => ""
]);
DB::reconnect('mysql');
where $dati->db is the database name for the logged user.
it work only in the current controller but all the other model and controller don't have the new db and returns error for missing tables.
how can i propagate the new settings to all model?
thanks in advance.

Answer 1

You should put it into a middleware.
For example:
<?php
class UserDatabaseMiddleware {
public function handle($request, \Closure $next){
$databaseName = $request->user()->db;
config(['database.connections.mysql.database' => $databaseName]);
return $next($request);
}
}
Then you should define it in App\Http\Kernel.php
<?php
protected $routeMiddleware = [
'dbselect' => UserDatabaseMiddleware::class
]
And finally you can add it to your route file. For example:
<?php
Route::group([
'middleware' => 'dbselect',
], function(){
Route::get('/', [MyController::class, 'myMethod'])->name('index');
})
Now the config should be changed with every http request if user is logged in.
Important:
As it was mentioned in the comments - having multiple databases per user is a bad approach. You should consider it.
There is another way to do this - you can have user_id for each record in table and then create global scope to select only records of logged in user.